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      Preparation of Clay/Biochar Composite Adsorption Particle and Performance for Ammonia Nitrogen Removal from Aqueous Solution

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          Abstract

          This study aimed to present a novel clay/biochar composite adsorption particle, which made from abandoned reed straw and clay to remove ammonia nitrogen (NH 4 +-N) from micro-contaminated water. The removal performance of NH 4 +-N by composite adsorption particle was monitored under different raw material proportions and initial NH 4 +-N concentration. Besides, adsorption kinetics and adsorption isotherms were investigated to reveal the adsorption mechanisms. The results showed that NH 4 +-N was effectively removed under optimal proportion of biochar, foaming agent and crosslinker with 20%, 3%, and 3%, respectively. The optimal contact time was 150 min and the best removal efficiency was 88.6% at initial NH 4 +-N concentration of 20 mg L −1. The adsorption performance was well described by the second order kinetic model and Freundlich model. The novel clay/biochar composite adsorption particle in this study demonstrated a high potential for NH 4 +-N removal from surface water.

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          Author and article information

          Journal
          JOUC
          Journal of Ocean University of China
          Science Press and Springer (China )
          1672-5182
          02 May 2020
          01 June 2020
          : 19
          : 3
          : 729-739
          Affiliations
          1College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
          2College of Marine Life Science, Ocean University of China, Qingdao 266003, China
          3Nanjing University of Information Science and Technology, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China
          Author notes
          *Corresponding author: LI Kuiran, Tel: 0086-532-66782758, E-mail: likr@ 123456ouc.edu.cn
          Article
          s11802-020-4150-9
          10.1007/s11802-020-4150-9
          Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2020.

          The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

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          Self URI (journal-page): https://www.springer.com/journal/11802

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